Half a syn for the Whole cake on all plans.
Preheat oven to 180c and line 2 sandwich tins, spray with fry light.
Whisk the eggs whites in one bowl until they reach the soft peak stage.
In another bowl whisk together the egg yolks, 4 tbsp sweetener, half the tub of quark, baking powder and the vanilla extract. Then whisk in half the egg whites.
Fold in the remaining egg whites with a metal spoon.
Tip the mixture into 2 sandwich tins which have been lined with baking parchment and sprayed with fry light.
Bake in the oven until well risen, golden brown and a skewer comes out clean, approx 20 mins. It will sink when you take it out so don't be alarmed.
Leave to cool for 5 mins then turn out and peel off the baking paper and place on a cooling rack to cool entirely.
Meanwhile take the other half of the quark and mix with 1 tbsp of sweetener. You can also add fromage frais at this stage too.
Spread half of the mixture on top of one cake and put the rest of the mixture on top and decorate with more fruit.